Apparatus for cutting valve faces



E. B. SHERK.

APPARATUS FOR CUTTING VALVE FACES.

APPLICATION FILED DEC.2I, I920.

WITNESSES INVEAITUR E L 5. SHEPK A TTORNEYS Patented Nov. 28, 1922.

Patented Nov 28, 1922.

' EARL BLA NE snnnn, or LEBANON, PENNSYLVANIA;

To all whom vltmag concern:

arena APPABA'IUS FOR CUTTINGVALVE FACES.

- Application fi1ed December 21, 1920. Se1ia1No. 432,354.- p 1 Be it known that'I, EARnBl SHERK, a citizen ofthe United States, andva resident of Lebanon, in the county of Lebanon and a State of Pennsylvania, have invented a new and ImprovedApparatus for Cutting Valve Faces, of which the following is a full, clear,

1 and exact description.

This invention relates to valve cutting devices and contemplates broadly an appara- ,-tus for cuttingthe face of a valve for refinishing the surface, after' thesame has be come worn, pitted v on otherwise mutilated 'to'such an extentas to hinder the perfect 1 -Some-of the principal objects ofthe presseatingand functioning of the same.--

-- ientinvention reside-in the provision of an wapparatus which includesmeans for supporting androtating a valve in the presence 20 f same adjustable tofaccommodate valves and ":Vfll-VG stems of various'sizes; meansfor ad- :jusjting the cutting tool withrespect to the valvefor-obtaining various angular cuts of of-a cutting tool; means for rendering the the valve face and means for varying or lregulating'the pressure of the valve against the cuttingtool whereby to obtain a liner or coarser cut.

Further objects of the invention reside in the simplicity of the construction, operation and method of association or removal of the .valve from the apparatus.

With the above recitedrand other objects in view, some of which will appear more clearly hereafter; reference is had to the following description, the appended claims and the accompanying drawings forming a part of this application, and in which;

Figure 1 is a plan view of the apparatus.

Figure 2 is a transverse sectional viewtherethrough taken approximately on the line 2-2 of Figure 1.

Figure 3 is a fragmentary sectional view taken on the line 33 of Figure 1.

Referring to the drawings by characters of reference, 10 designates the base of the apparatus which may be cast or otherwise constructed and which is provided with overly the bearing blocks 11.

ifu Fum and supbort jforone mi of the taining yoke 14. The opposite-end of the retaining yoke leljis forked to provide the spaced arms 15 which are adapted to The retaming yoke is provided with a vertically arranged enlarged aperture which receives the upstanding shank 16 having a threaded extremity 17 for the reception: of a securing nut 18. By thisarrangement the stemS of avalve, placed in the if-shaped notches or bearings 12 of the blocks llmay be confined therein against removal. An upstanding tool block 19 is provided substantially at the 7 center of the base and is angularly 'di'sposed with respect to the sides and ends thereof gaged in the threaded bore 24 extending downwardly through the upper end of the tool blocln The forward face of the tool is 8 beveled to provide the cutting- 25 and the rear face is oppositely beveled as at 26.

to co-act with the adjusting screws'27 which are threadedly received "by the flange 20. By this arrangement the'cutting tool may be adjusted to obtain various angular cuts of the valve'face. In order-to provide means for regulating'and obtaining anyeven depth of the cut, a pressure regulating screw '28 is provided which isthreaded through the upstanding lug 29' disposed at the opposite end of the base from the bearing blocks 11. The screw 28 is arranged in axial alignment with the valve and its inner end bears directly on the crown or head of the valve as clearly illustrated in Figure 1 of the drawings. The opposite end of the screw is provided with aknurled knob 30 for manipulating the screw to obtain the desired adjustment thereof. In order to provide means for rotating the valve, use is made of a crank 31 which is provided with a handle 32 at one extremity and is formed withan opening 33 at its opposite extremity which is adapted to receive the valve stem. A set screw 34; serves to secure the crank to the valve stem.

In use and operation of the device, the valve stem S is arranged in the V-shaped hearings or notches 12 of the bearing blocks 11 with the valve proper disposed between the lug 29 and one of the blocks 11, the securing screw 23 is loosened to obtain the the use of various sizes of valves in connection with the apparatus.

While there has been illustrated and described a single and preferred embodiment of the invention no limitation is necessarily made to the precise structural details, as it is understood that variations and modifications which fall within the scope of the appended claims may be resorted to when 'found expedient.

I claim:

1. A device for ret'acing gas engine valves including a base, means for supporting the valve comprising longitudinally bearing standardsprovided with aligned V- shaped notches in the upper ends, a laterally spaced intermediate standard onsaid base, a stud bolt intermediate said standards, a yokehaving spaced arms projecting in one direction and a central arm projecting in the opposite direction and provided with a central aperture receiving the stud bolt, the said spaced arms adapted to overlie the bearing standard to confine thevalve stem in the V-shaped notches thereof for turning movement, the single arm being fulcrumed on the remaining standard and a nut for advancing and retaining the yoke against said standard and valve stem, a tool supporting means comprising an upstanding tool support, a tool swivelly spaced mounted on the support andadjusting and retaining means for holding the tool in various angular positions, and means for regulating the pressure of the valve face against the tool comprising a bearing standard and a pressure regulating screw extending therethrough in axial alignment with the valve for engaging the side of the valve opposite to that from which the stem projects.

2. An apparatus for refacing valves in- 'cluding a base having longitudinally spaced upstanding bearing blocks having V-shaped grooves in their upper ends, said grooves disposed in horizontal and vertical alignment for the reception of a valve stem, a laterally spaced standard longitudinally intermediate of said bearing blocks, an upstanding stud bolt between the standard and bearing blocks, an apertured yokereceived'by the upper end of the stud bolt having spaced extremities overlying the V-shaped notches andan oppositely projecting lateral extremity in engagement with the upper end of the standard, a retaining "nut threaded on the upper end'of'the stud bolt for advancing and retaining the spaced extremities or the yoke and in engagement with the stem and the laterallyspac'ed' ex tremity in engagement with the standard, an upstanding tool block on the basespaee'd laterally out of axial alignment with the V-shaped notches, a cuttingtool carried by the tool block, means for varying the angle of the cutting edge of the tool and retaining the same in its adjusted POSltlOIbQHJlQHP- standing lug having a threaded"bore in axial alignment with-the V-shaped notches, and a pressure regulating screw in the bore of said lug adapted to engage with a valve' for advancing and retaining the facethereof into coact ng engagement wlth the-cuttuig'edge of the tool. i

'EARLBLAINE'SHERK. I 

